Thu Nov 18 11:59:50 2004 ALTER SYSTEM SET job_queue_processes=0 SCOPE=MEMORY; Thu Nov 18 12:01:30 2004 ALTER SYSTEM SET job_queue_processes=10 SCOPE=MEMORY; Thu Nov 18 12:01:30 2004 Restarting dead background process CJQ0 CJQ0 started with pid=8 但是Job仍然不執行，而且在再次修改的時候，CJQ0直接死掉了。 Thu Nov 18 13:52:05 2004 ALTER SYSTEM SET job_queue_processes=0 SCOPE=MEMORY; Thu Nov 18 14:09:30 2004 ALTER SYSTEM SET job_queue_processes=10 SCOPE=MEMORY; Thu Nov 18 14:10:27 2004 ALTER SYSTEM SET job_queue_processes=0 SCOPE=MEMORY; Thu Nov 18 14:10:42 2004 ALTER SYSTEM SET job_queue_processes=10 SCOPE=MEMORY; Thu Nov 18 14:31:07 2004 ALTER SYSTEM SET job_queue_processes=0 SCOPE=MEMORY; Thu Nov 18 14:40:14 2004 ALTER SYSTEM SET job_queue_processes=10 SCOPE=MEMORY; Thu Nov 18 14:40:28 2004 ALTER SYSTEM SET job_queue_processes=0 SCOPE=MEMORY; Thu Nov 18 14:40:33 2004 ALTER SYSTEM SET job_queue_processes=1 SCOPE=MEMORY; Thu Nov 18 14:40:40 2004 ALTER SYSTEM SET job_queue_processes=10 SCOPE=MEMORY; Thu Nov 18 15:00:42 2004 ALTER SYSTEM SET job_queue_processes=0 SCOPE=MEMORY; Thu Nov 18 15:01:36 2004 ALTER SYSTEM SET job_queue_processes=15 SCOPE=MEMORY;
嘗試重起數據庫，這個必須在晚上進行：
PMON started with pid=2 DBW0 started with pid=3 LGWR started with pid=4 CKPT started with pid=5 SMON started with pid=6 RECO started with pid=7 CJQ0 started with pid=8 QMN0 started with pid=9 ....
CJQ0正常啟動，但是Job仍然不執行。發現Oralce有這樣一個Bug:
1. Clear description of the problem encountered: slgcsf() / slgcs() on Solaris will stop incrementing after 497 days 2 hrs 28 mins (approx) machine uptime. 2. Pertinent configuration information No special configuration other than long machine uptime. . 3. Indication of the frequency and predictability of the problem 100% but only after 497 days. 4. Sequence of events leading to the problem If the gethrtime() OS call returns a value > 42949672950000000 nanoseconds then slgcs() stays at 0xffffffff. This can cause some problems in parts of the code which rely on slgcs() to keep moving. eg: In kkjssrh() does "now = slgcs(&se)" and compares that to a previous timestamp. After 497 days uptime slgcs() keeps returning 0xffffffff so "now - kkjlsrt" will always return 0. . 5. Technical impact on the customer. Include persistent after effects. In this case DBMS JOBS stopped running after 497 days uptime. Other symptoms could occur in various places in the code.
原來是計時器溢出了，重新檢查主機:
bash-2.03$ uptime 10:00pm up 500 day(s), 14:57, 1 user, load average: 1.31, 1.09, 1.08 bash-2.03$ date Fri Nov 19 22:00:14 CST 2004
安排重起主機系統,重起以后問題解決，狀態如下:
$ sqlplus "/ as sysdba" SQL*Plus: Release 9.2.0.3.0 - Production on Fri Nov 26 09:21:21 2004 Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved. Connected to: Oracle9i Enterprise Edition Release 9.2.0.3.0 - Production With the Partitioning, OLAP and Oracle Data Mining options JServer Release 9.2.0.3.0 - Production SQL> select job,last_date,last_sec,next_date,next_sec from user_jobs; JOB LAST_DATE LAST_SEC NEXT_DATE NEXT_SEC ---------- --------- ---------------- --------- ---------------- 70 26-NOV-04 09:21:04 26-NOV-04 09:26:00 SQL> / JOB LAST_DATE LAST_SEC NEXT_DATE NEXT_SEC ---------- --------- ---------------- --------- ---------------- 70 26-NOV-04 09:26:01 26-NOV-04 09:31:00 SQL> SQL> select * from v$timer; HSECS ---------- 3388153 SQL> select * from v$timer; HSECS ---------- 3388319 SQL> FAQ
